Flushing-valve.



' D. A. McCONNE LL & R. WANDRA'S.

FLUSHING VALVE. APPLICATION FILED FEB. 20, 1914.

1 17,792. Patented Feb. 27, 1917.

Q NI WITNESSES resident of Arlington annular portion 7 of ploy ametallic shell 6,

srnres reruns oeiuoui DUNCAN A. MQCONNELL, 0F ARLINGTO AND-ROBERTWANDRAS, or KEARNEY, NEW 1 JERSEY."

'rLUsHfING vnLuij. a

- Specification of rzetters Patent.

zep ue'afiammeu {February 20; 191 1. seriai Ito. 819,952.

Taa'ZZ'wYwm itmag c'on'ce'm: 7

Be it known {that We, DUN AN A. lWcGON- 'NELL, a" citizen of the UnitedStates, h in-the county of Hudson and State of New Jersey, and ROBERTVVANDRAs, a citizen of th'efUnit'ed' States,

and resident 'of Kearney, in the county of Hudson State-er New Jersey,have vented :certai n new and useful Improve- Inents in Flushing-Valves,of which the following is aspecification. v

This invention relates to c'e'rt'ain improvements in flushing valves andmore particularly to that type in which 'the main valve after havingbeenopened wflr-eut matieany close :but 'only aft'er a predeterminedtime interval. This 'type of constru'ction involves a l-iquid ch-am'he'rhaving communicating with the inlet-of the main val-ive, an'l'soeonnected with the main valve that :the liquid is expelled from saidchamber upon "the pening of the main alve. The time interval requiredfor the closing of the ina in Valve is dependent upon the time requiredfor the liquid to refill said chamber through the restri'eted inlet ofthe latter. "inong'the particular j'objects sought *to be "accomplished'by our improved "constru'ction is to "reduce to minimum the number ofseparate parts of the valve; to simplify these parts and reduce the costof manufacturing them.

Reference is to -be had to the accompanying drawing forming a part ofthis spec-ication, and in -Whi'ch like letters indicate like arts Figure1 is a substantially central longitudinal section through our improvedflushing valve, which here appears as closed or in normal positionofi'n'actii'rity.

Fig. is a; similar section with certain inovahle parts slightlydisplaced frer'ntheir normal pesitionsge fter pressure is first appliedto the actuating device.

Fig. 3 is a similar section va lv'e fully open.

In the specific with'the inai'n form illustrated, We emor containing'member, of any suitable forimand adapted to be rigidly connected incircuit to the supply and delivery pipes. One end may have reduceddiameter; for attachment to a supply pipe 4 and a nipple *8 at one sidefor attachment to an outlet or (delivery "pipe, not shown. Between theinto serve also as a screw plug. "d'i'fte oi its ends a restricted inlet "While below the "of openings 22 fc'ornmunieafing with the +1eweremp jr tm nt 14, The lo ver poition "a boss 26,

" f j'thro'ug'h the value and terminates below the seat. 'gb'e a'just'edso as to let and 7 outlet is a partition '01 fiange 11 of annularwalland'*cIi-v1ding :t11e she'll into an upper compartment l3- 1n opencommunication withthe outlet and a lower compartment 14, in :opencommunication With the inlet.

" valve easm g 15,h'a-ving the general proiui'niaite form of a eylinder,projects into the end-of the shell" opposite to the inlet and rm,preferably integral With the' Patented Fen-2' 7, 1 91a.

is threaded "externally at its *out'er end so Inter inethe valve casing'15 is pro 'v'ide'd with a shoulder '20 *of annular form, adapted ft'oseat ii'p'on the annular partitioii or flange 1 1 a'nd fori'n aWater-tight fit and complete tne separati'on of the ehainbers {1 3 {andL Abeve the sh'oulderQO-openihgs 1 8 "lead through the casing wall fromthe interior thereof to th upperi-compaftmeht 13, shoulder were a numbe21 0f *the 'v-alye casing is of greater internal "d i than; the mainbody portion there of Torinsa Valve chamber 33 terminat- 'at its upperend in internal annular shoulder or seatQS between the two series of theopenings,

A closure the 'va'l y'e chainbe'rZl, and is rovided with preferablynon-"circular in crosssection to facilitate the use o 'fa 'Wrenh inpiu-g 24 closes the lower end of S securing {the closure in place.Through the closure anchboss is a constricted passage controlled by aneedle -v2' lve27 adapted to seat again-Ste rrusteeenicel terminal foorthe passage. A passage" 28 extends "needle valve 27*, it may regulatethe fl'oWinto the val e'ehainbe'fr 33.

fBy turning the .Witlfin'flie valve chamber 21 is the inain valve 'riphera-l' wall closely fitting Within the Ineniber 318, having the generalrem invertedcup with a cylindrical 'pfecylindrical Wall portion. 21, andhaving an "end Wall adapted to engage at itsperiphery with "the seat 23and.

U se a ate-the 33 'fro'm the interior of the valve caslng "above theseat "23. The peripheral Wall is or such length that when the valveseated as indicated in Fig 1, the openings Will be covered by thisperipheral Wall, but when the Valve is depressed to its lowermostpositi-on as indicated in Fig. 3, the entire avail will come below theopenings 22. The valve member has a tubular stem 37 extending up throughthe top or end wall of the valve casing where leakage may be preventedin any suitable manner as for instance by an annular packing 34. Apassage 39 extends from the valve chamber 33 through the valve 38 at thebase of the valve stem 37, and is controlled by a valve member 41. Thislatter valve has a valve stem 42, of smaller diameter than the tubularvalve stem 37, and extending axially therethrough, to a knob 45 beyondthe outer end of the tubular valve stem.

A spiral spring 43 acts to normally hold the valve 41 to its seat butthe tension of the spring is not so great but that the valve 41 willalways open before the valve 38, as hereinafter pointed out. As shownthis spring encircles the upper end of the valve stem 42, and is housedwithin a compartment 44 in the upper end of the valve stem 37. The knobpreferably has an annular flange telescoping with the housing so as tokeep the spring concealed at all times, and the lengths of the two valvestems are such that the spring can be compressed to only a light extentbefore the knob engages with the valve stem 37.

With the various movable parts in their normal positions as shown inFig. 1, no water can pass through or by the main valve. The valvechamber 33 will be filled by water entering past the needle valve andthe valve member 38 will be held against its seat 23 by the waterpressure. The valve member 41 will be held against its seat by action ofthe spring 43.

hen it is desired to open the valve, pressure is applied to the knob 45.As it moves downwardly a very slight distance, the valve member 41 isdisplaced from its seat, as indicated in Fig. 2, and the water isallowed to escape from the chamber 33. The main valve will then be movedto the lower limit of its travel, by the engagement of the knob with thevalve stem 37, and will at the same time eject the water from chamber33. The openings 22 are now uncovered and water may flow freely inwardthrough these openings, and follow the course indicated by the arrows inFig. 3. Upon releasing the knob 45 the spring 43 instantly raises theknob 45 a slight distance relatively to the tubular valve stem 37 sothat the valve member 41 seats and prevents the further flow of waterthrough the valve member 38 or through the chamber 33. The waterentering slowly through the needle valve 27, gradually raises the valvemember 38 to its uppermost position, and after a predetermined timeinterval, closes the openings 22 so as to shut off the flow of waterthrough these openings. Even after the closure of these openings, thevalve member 38 continues to rise until it seats against the shoulder 23so that the flow is prevented not only by the closing of the openings 22by the valve member 38, but also by the valve member pressing upwardlyagainst its frusto-conical seat. Leakage is thus very effectivelyprevented, particularly as the valve member 38 must overlap the openings22 for a little distance before the valve member reaches its seat.

The interval during which water flows freely through the openings 22controls the volume of water discharged with each successive use of theflushing valve, and this interval is time-controlled to the extent that,for a given pressure of water and a given capacity for the needle valve27, a definite time interval is required for sufficient water to passthrough the needle valve and raise the valve member 38 to the upperlimit of its travel. i

In case it is desired to repair or replace any of the parts it is merelynecessary to remove the valve casing 15, by unscrewing it from the shell6, and lifting it out of the latter. The valve casing 15 carries both ofthe valve members 38 and 41, as well as all other movable parts so thatthey may be removed and replaced as a single unit and without disturbingthe adjustment or relative arrangement of any of the parts, and withoutdetaching the shell from the supply and delivery pipes. The mereattachment of the casing clamps the shoulder 20 against the annularpartition 11, and forms a thoroughly water-tight joint. The valve casingand shell may be quickly and inexpensively manufactured by a very fewoperations on a turret lathe, as all of the finished surfaces areconcentric.

We do not limit ourselves to the precise construction shown, asvariations may be made therein without departing from the spirit of ourinvention, the scope of which is commensurate with our claim.

Having thus described our invention, what we claim as new and desire toprotect by Letters Patent, is:

A valve casing and a main valve cotiperating to form a pressure chamberin permanently open but restricted communication with the source ofliquid under pressure, said casing having a main port out ofcommunication with said chamber and normally closed by said valve, saidvalve being held closed by the pressure of liquid in said chamber, atubular valve stem having an inlet communicating with said chamber andhaving an outlet on the low pressure side of the valve, a second valveseated at the inlet of said valve stem to normally prevent the escape ofliquid from said chamber through said valve stem, and a second valvestem connected to said second mentioned valve and operating through saidtubular valve stem to open said second valve, and a spring and State ofN eW Jersey this seventeenth Within said tubular valve stem for normallyday of February, A. D. 1914.

holding said second valve closed and means DUNCAN A. MOCONNELL. foropening said first valve by a further end- 7 ROBERT WANDRAS. wisemovement of the second valve stem Witnesses:

after the opening of the second valve. IRVING MOLNIGHT, Signed at Newarl; in the county of Essex 1 GEORGE C. DEAN.

-0oples of this patent may be obtained for five cer'i ts each, byaddressing the Commissioner of Patents, Washington, D. G.

